Man... I've been lurking here hoping HEA would never get brought up. Now that the ice is broken, here's a few quick hits, each increasingly unlikely:
1) BC won't get a B1G invite. Geographically, the B1G would invite several other eastern schools first in order to create a suitable bridge (Rutgers, Syracuse, even a very unlikely UConn). Their next focus is on NY, not Boston. B1G can look at the ACC's example, and I don't think the ACC is getting the number of eyes in the northeast they thought they would. There is definite disappointment with BC's fans ability to travel south for big games (bad title game turnouts, bowl turnouts have resulted in BC always being taken with the lowest pick they can be taken at based on their record). Small school for this level.
2) If BC does get poached due to all conference considerations, I don't think HEA collapses.
3) If BC does get poached and HEA collapses, it would be hard for BU, UNH, and UMO to go anywhere without UVM. Plus, in the market presence and public perception led world that led to the NCHC, UMass, Providence, and Northeastern are not unattractive entities. Of course, in this world, Providence & and stronger hold on the Boston market is probably more attractive that Colorado Springs, Omaha, Duluth, Oxford, and Grand Forks, even with Denver thrown in.
4) If BC does get poached and HEA collapses and the schools don't find joining the NCHC ridiculous, then the truly best option for the NCHC grabbing the Boston market is to take BU and UNH then walk away. Any other school would provide only incrementally more Boston attention while increasing travel costs, reducing the gate, or resulting in the pie being sliced in smaller chunks than necessary.
This is a CCHA/WCHA thread, so let's not totally sidetrack the thread. I just thought chiming in with an eastern perspective on the west's nonsense would be helpful.